Researchers at the California Institute of Technology (Caltech) have built a device that produces highly focused, high-amplitude acoustic signals dubbed "sound bullets." Called a nonlinear acoustic ...

Acoustic lenses are employed in a variety of applications, from biomedical imaging and surgery to defense systems and damage detection in materials. Focused acoustic signals, for example, enable ...

Scientists have created a powerful acoustic weapon called a "sound bullet" that could help kill cancer cells and down hostile submarines in war. Here's how the system is constructed: researchers lined ...